Iowa Witnessed Fall
Item: 63.1 Dimensions: 115 x 60 x 60 mm Weight: 880 g
Provenance: American Museum of Natural History, New York
Partial/complete: Complete
Cube: ~15mm x 15mm x 15mm ≈ 15mm3

Forest City

Country: USA
Region: Iowa
Fell: 1890, May 2, 17:15 hrs
Group: Stone
Type: Ordinary Chondrite
Class: H5
Total known weight: 152kg

After appearance of a brilliant fireball moving from W to E leaving a trail of smoke, and detonations, a shower of stones fell over an area of 2 miles by 1 mile; the shower comprised five large stones of 80lb, 66lb, 10lb, 5lb, 4lb and over 500 small ones. The total recovered weight is about 122kg, J.Torrey and E.H.Barbour, Am. J. Sci., 1890, 39, p.521, Amer. Geologist, 1891, 8, p.67, G.F.Kunz, Am. J. Sci., 1890, 40, p.318, H.A.Newton, Am. J. Sci., 1890, 39, p.522, M.H.Hey, Cat. Met., 1966, p.163. Olivine Fa19, B.Mason, GCA, 1963, 27, p.1011. Hydrogen and carbon isotopes, G.Boato, GCA, 1954, 6, p.209. Study of metal phase, H.C.Urey and T.Mayeda, GCA, 1959, 17, p.113. Bi, Tl and Hg analysis, W.D.Ehmann and J.R.Huizenga, GCA, 1959, 17, p.125. Rb-Sr dating, D.D.Bogard, Earth Planet. Sci. Lett., 1967, 3, p.179. Analysis, 27.2% total Fe, B.Mason and H.B.Wiik, Am. Mus. Novit., 1965, (2220).